Mold.



N. HELTZEL.

MULD.

APPLKEATION FILED ssh.

Patented Oct. 10, 1911.

2 SHEETSSHEET 1.

JOHN nqnnmzan, or eras-arcs, 'iiitrnorsi IYIOLIO.

To all whom it may concern:

Be it known that I, Jonx X. 'Hmm, a citizen of the United States, residing at Streator, in the county of Lasalle and State of Illinois, have invented certain new and useful Improvements in Molds, or" which the following a specification, reference being had thereinto the accompanying drawing.

This invention relates to molds, for use in making sidewalk and other pavements of concrete or other plastic material, of the type in which side-rails are positioned to mold the side or the pavement and are held in proper relation by division-plates or other suitable Connecting members, the rails and connecting members being removable from the portionof the pavement which has set and transferable to position for use in continuing the pavement-.-

The side-rails provided by the invention are so shaped that they will best sufiicicnt strength and not liable to be bent out of shape when made of comparatively thin sheet material, whereby the necessity of emplo'ying heavy material is avoided.

The mold may be adjusted to the exact length desired by employment of rails departing from thenature and spirit of the shaped-"as contemplated by this invention which are slidable one over-another; and means are also provided by the invention to securely attach abutting ends of rails togather. Etis necessary to employ clamps in neither form of rails.

The division-plates are detachably eonnected to the side-rails in such 'i'nanner that, although easily removed, they are securely held in place; and the position of the division-plates when connected with the siderails is such that their top edges are flush with the tops of the'side-rails, whereby they do not interfere with the operation of tools used in finishing the pavement.

When read in connection with the description herein, the details of construction and arrangement of parts contemplated by this invention will be apparent iron; the accompanying drawings, forming part "hereof, wherein an embodiment of the invention, applied to molds for forming sidewalks, is shown, for purposes of illustra tion, to he understood, however, that the several inst: amentalities of which the invention consists can'be variously organized without Specification of Letters Idatent. Pgfgnfqid 0 [application filed September 6, 1910, Serial No. 580,644. 7

It is invention, and that the invention isnot to be necessarily limited in interpretation of the 'iaims hercinat'terto the lineation herein.

-Like referencecharacters refer to corresponding parts in the several views of the drawings, of which v Figure 1 is a perspective view-0f the mold; Fig-25s an enlarged end view of a side-rail; Fig. 3 is a view illu strativc of means for connectingl abutting ends of siderailstogether; Fig. dis a view. illustrative prl cise deat a manner otUtelescopi cally ccmnecting side-rails to form a mold of enactly the desired lengthgfFig. 5 'is a transverse sectional view of telescoping side-rails Fig. b is "a side'vi'ew of a division-plate; Fig, .7-;is a transverse sectional vieiv of divisionplate; and Fig. an a viewof the diyi-siow plate straightener. a

Having n cra -particular ,re.tere1 1ce to the drawings,- 9 designates division-plates or connecting. members, each of which is tapered from top to bottom, as shown in Fig. 7, to make easy its Withdrawal from set plasticmaterial. The division-plates are made with slots 10, one near eachend, extending from the bottom edge for a considerable distance toward the top, whereby a'leg 11 is formed. The slots are wedged shaped with the greatest width at the bots torn=-that is, they decrease in= width,fro1n bottomto The plates are beveled, as

shown at 12, at theopen ends of theslots.

Holes 13 are formed in the plates, one near the top of eachleg 11; and near each end the plates have nichesl t intheir top edges.

The. division-plates are used. to form expansion-joints in the pavement and to connect and hold in proper relative positions side-rails 15 which constitute'the sides of the mold. Finch side-railis made OfCOllrparatively thinmaterial, preferably sheet .metal which may be as thin as one-sixteenth inch, and it is'forined with web. 16' having strengthening-flanges 17 at the bottom and 18 at the top. The flanges heat, or substan tially at,uright angles to the web, andthey reinforce the rail against bending in-a transverse line. To reinforce flange 18, it is formed with a depending fiai'ige which extends toward flange 17. Besides strength.- ening the rail, the; flanges perform a functicn in connecting rails together, as hereinformed, and thus sharp edges, which would cause inconvenience to workmen are avoided.

Eachside-rail is formed with a slot 20 ex-. tending from the'topinto. the web a distance equal tothat betwe'n the top of the division plates and the endsflof the slots thereof, and with a 'slot 21 "continui into flan'ge 18. Slot 21 is wi ened intermediatelits ends, as shown. at 22. The formation'of each pair of slots 20'. and 21 is such that the leg 11 of a division-plate may be dropped through slot 21 and caused to overlap the web 0 the side-rail and thereby be connected with the rail. The portion of the plate between its top andthe-ends of its slot 10'seats then in-slot 20 of the rail and holds the plate against turning movement. As the slot 20 is just as long as thedistance between the to of the division-plate and the end of its s 'ot 10, when the plate is in connected position its top edge is flush with ,thetopof the rail. Thebeveled ends 12 of theslgts 10 make easy the placing of the plate over the rail, and slot 21, through whichthe leg 11 passes,-forms a guide to direct the rail into .slot 20.

The width ofslot 10 is made somewhat greater at its bottom end than the thickness of the material of the web of the side-rail, in order that there may be n0 difiiculty in connecting and disconnecting the plate; but,

as'the slot decreases in width toward the top, its edges are wedged against the web at the top, whereby the plate is held down in'position. ,In order to securely hold the plate at the bottom in seated position, the web is formed, below each pair of slots 20. and 21, with a protuberance 23 sufficiently low on the web to be engaged by the leg 11 first when the plate is almost in seated position and over which the leg is forced as the plate is continued inmovement down to seated position.- In order to start the plate from its frictional en agement with the protuberance and with t e web of the side-rail, when itis desired to raise the plate, the end of a lever is inserted through the widened portion of slot 21 and into hole 13 of the plate and that end moved upwardly. When the plate is't'hus loosened, it is free to be lifted from the .side'rail. When the division-plate is in place and the web of the side rail is enveloped by its engagement in the slot 10 ofthe plate, the plate serves to reinforce the web against bending in a longitudinal line.

. In order to connect together the abutting ends of side-rails,'a sleeve 24 of the same shape 1n cross section as the rail, 1s riveted or otherwise secured mteriorly to one end of,

a rail and with which the abutting end of the next rail may have sliding engagement from slot 20 molds when desired, some of the rails are i made of diiferent size in cross section so that In order to pro-,

they may snugly slip into or over the others, as shown in Figs. .4 and 5, wherein the larger rails are designated by 15*. The larger rails are of the same shape as the smaller rails, except that they are provided with an u 1 The lianges 17"? and 19 prevent lateral relative movement between the rails. The larger and smaller rails may be teleseoped in an obvious manner to make the sides of the mold the exact length desired. The material of the side-rail, when made with flanges as contemplated herein, may be so thin that the lapped end of the outer telescoping rail section will make no appreciable inset in the side ofthe pavement or other thing being molded.

'In using division-plates of comparatively thin material in pavement-molds, trouble is sometimes caused by bending of the plates while the pavement material is being tamped down, thus resulting in an irregular-seam or expansion-joint. To strengthen the plates during the tamping operation, I

wardlyextending flange 17 on the flange provide a strengthener 25', formed of L shaped elongated angle members 26 held together in parallel relation by straps 27 riveted or otherwise secured thereto in such manner that the lower strips or legs 28 there of may envelop the top edge ogf-the division plate and grip the sides of the plate, thus maintaining the plate in a straight osition. The angle members are nearly t e same length as the distance between the siderails, and the strips or legs thereof are slightly spread at the bottoms tb facilitate the placing of the strengthener over the plate and permit it to be wedged down thereon for the tamping operation. When the tamping is completed, the strengthener may be lifted oil, so that it will not interfere with the. operation of the finishingtools. The niches l t in the top edges of the division-plates are to permit a finishing trowel to be drawn along the side-rail without being interfered with by the plate.

Having thus described my invention,what I claim as new, and desire to-secure by Lettars-Patent is-. v

1.111 a mold, the combination of a sidorail having a lateral protuberance, a division-plate having near an end a slot opening from the bottom edge and extending up v the protuberance. 1

\vardly in gradually decreasing width from' low the slot; and a flange extending laterally from the weband havin a slot opening a into the Web-slot, and a d vision-plate having -a wedged-shaped slot extending up wardlyv from its lower edge and a leg formed by said wedge-shaped slot, the platebeing arranged to be lowered intothe rail-- slots and to have the web and its protuberance wedged into the plate-slot, the leg pass- 1 ing through the flange-slot, and the ortion of the plate above its slot seating in te web slot.

'from the .web and havin thereinto anda flange extending laterally a slot Opening into the web-slot, and a dlvision-plate having a wedge-shaped slot extending upwardly from its lower edge and a leg formed by said slot, the plate beingadapted' to be low'- 3. In a mold, a, side-rail comprising a web-having a slot extending downwardly ered into the rail-slots and to have the web wedged into the plate-slot, the leg passing through the flange-slot, and the portion of the plate above its slot seating in the webs 0t. I

.In testimony whereof I aflix my signature in presence oftwo witnesses.

JOHN N. HELTZEL.

Witnesses: Y

W. C, JONES, O. T. Lower. 

